GLAST/LAT > DAQ and FSW > FSW

FSW Requirement 5.4.1 (prev, next)

Req. 5.4.1: "System of Units"

The LAT shall conform to the observatory requirement to observe the current NASA policy directive, NPD 8010.2C, "Use of the Metric System of Measurement in NASA programs". For all external command and telemetry interfaces, the LAT FSW shall use metric units with the following exceptions: Angular measure may be expressed in degrees, minutes, and seconds; Photon and particle energy may be expressed in eV; and English units may be used for mechanical fabrication.

Basis (help)

[1] (3.1.1.7, 3.3.1.7), [2] (3.2.1.6)

    1: "Mission System Spec." (NASA 433-SPEC-0001)

      3.1.1.7: "Units of Measurement"

      GLAST shall observe the current NASA policy directive, NPD 8010.2C, Use of the Metric System of Measurement in NASA programs.

      Metric units shall be used with the following exceptions: Angular measure may be expressed in degrees, minutes, and seconds; Photon and particle energy may be expressed in eV; and English units may be used for mechanical fabrication.

      3.3.1.7: "Units of Measurement"

      The observatory shall observe the current NASA policy directive, NPD 8010.2C, Use of the Metric System of Measurement in NASA programs.

      The observatory shall use metric units with the following exceptions: Angular measure may be expressed in degrees, minutes, and seconds; Photon and particle energy may be expressed in eV; and English units may be used for mechanical fabrication.

    2: "LAT Instrument - Spacecraft Interface Requirements Doc." (NASA 433-IRD-0001)

      3.2.1.6: "Use of Metric System"

      GLAST shall observe the current NASA policy directive, NPD 8010.2C, Use of the Metric System of Measurement in NASA programs. Metric units shall be used with the following exceptions: Angular measure may be expressed in degrees, minutes, and seconds; Photon and particle energy may be expressed in eV; and English units may be used for mechanical fabrication.

Context (help)